Despujolsite
A valid IMA mineral species
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About Despujolsite
Formula:
Ca3Mn4+(SO4)2(OH)6 · 3H2O
Colour:
Pale yellow to deep yellow-green
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.46
Crystal System:
Hexagonal
Member of:
Name:
In honour of Pierre Despujols (1888–1981), founder of the Moroccan Geologic Survey.
Unique Identifiers
Mindat ID:
1269
Long-form identifier:
mindat:1:1:1269:6
GUID
(UUID V4):
(UUID V4):
b543d331-df21-46ce-9ebf-7ad7868838f9
IMA Classification of Despujolsite
Approved
Approval year:
1968
Classification of Despujolsite
7.DF.25
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
31.7.6.1
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
25.9.6
25 : Sulphates
9 : Sulphates of Mn
25 : Sulphates
9 : Sulphates of Mn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Dpj | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Despujolsite
Vitreous
Transparency:
Transparent
Colour:
Pale yellow to deep yellow-green
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.46(2) g/cm3 (Measured) 2.52(2) g/cm3 (Calculated)
Optical Data of Despujolsite
Type:
Uniaxial (+)
RI values:
nω = 1.656(2) nε = 1.682(2)
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
O slightly paler yellow than E.
Chemistry of Despujolsite
Mindat Formula:
Ca3Mn4+(SO4)2(OH)6 · 3H2O
Crystallography of Despujolsite
Crystal System:
Hexagonal
Class (H-M):
6 m2 - Ditrigonal Dipyramidal
Space Group:
P62c
Cell Parameters:
a = 8.5405(5) Å, c = 10.8094(9) Å
Ratio:
a:c = 1 : 1.266
Unit Cell V:
682.81 ų
Z:
2
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018458 | Despujolsite | Barkley M C, Yang H, Evans S H, Downs R T, Origlieri M J (2011) Redetermination of despujolsite, Ca3Mn4+(SO4)2(OH)6*3H2O Acta Crystallographica E67 i47-i48 |  | 2011 | N'Chwaning III mine, Kalahari Manganese Field, South Africa | 0 | 293 |
| 0012127 | Despujolsite | Gaudefroy C, Granger M M, Permingeat F, Protas J (1968) La despujolsite, une nouvelle espece minerale Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 91 43-50 | 1968 | Tachgagalt, Morocco | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.34 Å | (very very strong) |
| 4.26 Å | (very strong) |
| 2.129 Å | (very strong) |
| 7.40 Å | (strong) |
| 2.570 Å | (strong) |
| 2.025 Å | (strong) |
| 3.49 Å | (medium strong) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Despujolsite
General Appearance of Type Material:
Hexagonal prisms with {10_10} dominant, modified by {10_12} and {0001}.
Place of Conservation of Type Material:
Ecole Nationale Supérieure des Mine, Paris, France, 51094.
Geological Setting of Type Material:
Hydrothermal mineral ion metamorphosed manganese deposits.
Associated Minerals at Type Locality:
Synonyms of Despujolsite
Other Language Names for Despujolsite
Relationship of Despujolsite to other Species
Member of:
Other Members of this group:
| Fleischerite | Pb3Ge(SO4)2(OH)6 · 3H2O | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| Genplesite | Ca3Sn(SO4)2(OH)6 · 3H2O | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| Mallestigite | Pb3Sb5+(SO4)(AsO4)(OH)6 · 3H2O | Hex. 6 : P63 |
| Schaurteite | Ca3Ge(SO4)2(OH)6 · 4H2O | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate) | Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O | Trig. 3 : P3 |
Common Associates
Associated Minerals Based on Photo Data:
| 7 photos of Despujolsite associated with Hausmannite | Mn2+Mn3+2O4 |
| 4 photos of Despujolsite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 2 photos of Despujolsite associated with Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| 2 photos of Despujolsite associated with Braunite-II | CaMn3+14(SiO4)O20 |
Related Minerals - Strunz-mindat Grouping
| 7.DF. | Aldridgeite | (Cd,Ca)(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
| 7.DF. | Chromschieffelinite | Pb10Te6+6O20(OH)14(CrO4)(H2O)5 |
| 7.DF. | Alcaparrosaite | K3Ti4+Fe3+(SO4)4O(H2O)2 |
| 7.DF. | Bairdite | Pb2Cu2+4Te6+2O10(OH)2(SO4) · H2O |
| 7.DF. | Carlsonite | (NH4)5Fe3+3O(SO4)6 · 7H2O |
| 7.DF. | Ammoniomathesiusite | (NH4)5(UO2)4(SO4)4(VO5) · 4H2O |
| 7.DF. | Erssonite | Mg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2O |
| 7.DF. | Flaggite | Pb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O) |
| 7.DF. | Poellmannite | Ca6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DF. | Haywoodite | [Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3] |
| 7.DF. | Cherokeeite | [Pb2Zn(OH)4](SO4) · H2O |
| 7.DF. | Cuprocherokeeite | [Pb8Zn3Cu2+(OH)16](SO4)4 · 4H2O |
| 7.DF. | Tzeferisite | CaZn8(SO4)2(OH)12Cl2(H2O)9 |
| 7.DF.05 | Uklonskovite | NaMg(SO4)F · 2H2O |
| 7.DF.10 | Kainite | KMg(SO4)Cl · 3H2O |
| 7.DF.10 | Kaliochalcite | KCu2(SO4)2[(OH)(H2O)] |
| 7.DF.15 | Natrochalcite | NaCu2(SO4)2(OH) · 2H2O |
| 7.DF.17 | Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate) | Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O |
| 7.DF.17 | Genplesite | Ca3Sn(SO4)2(OH)6 · 3H2O |
| 7.DF.20 | Metasideronatrite | Na2Fe(SO4)2(OH) · H2O |
| 7.DF.20 | Sideronatrite | Na2Fe(SO4)2(OH) · 3H2O |
| 7.DF.25 | Fleischerite | Pb3Ge(SO4)2(OH)6 · 3H2O |
| 7.DF.25 | Schaurteite | Ca3Ge(SO4)2(OH)6 · 4H2O |
| 7.DF.25 | Mallestigite | Pb3Sb5+(SO4)(AsO4)(OH)6 · 3H2O |
| 7.DF.30 | Slavíkite | (H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O |
| 7.DF.35 | Metavoltine | K2Na6Fe2+Fe3+6O2(SO4)12 · 18H2O |
| 7.DF.40 | Lannonite | Mg2Ca4Al4(SO4)8F8 · 24H2O |
| 7.DF.40 | Vlodavetsite | AlCa2(SO4)2F2Cl · 4H2O |
| 7.DF.45 | Peretaite | Ca(SbO)4(SO4)2(OH)2 · 2H2O |
| 7.DF.50 | Gordaite | NaZn4(SO4)(OH)6Cl · 6H2O |
| 7.DF.50 | Calamaite | Na2TiO(SO4)2 · 2H2O |
| 7.DF.52 | Scordariite | K8(Fe3+0.67◻0.33)[Fe3+3O(SO4)6]2 · 14H2O |
| 7.DF.52 | Huizingite-(Al) | [(NH4)9(SO4)2][(Al,Fe3+)3(OH)2(H2O)4(SO4)6] |
| 7.DF.55 | Clairite | (NH4)2Fe3(SO4)4(OH)3 · 3H2O |
| 7.DF.55 | Giacovazzoite | K5Fe3+3O(SO4)6 · 10H2O |
| 7.DF.57 | Magnanelliite | K3Fe3+2(SO4)4(OH)(H2O)2 |
| 7.DF.60 | Arzrunite | Cu4Pb2(SO4)(OH)4Cl6 · 2H2O (?) |
| 7.DF.60 | Evdokimovite | Tl4(VO)3(SO4)5(H2O)5 |
| 7.DF.62 | Bridgesite-(Ce) | CaCe2Cu6(SO4)4(OH)12 · 8H2O |
| 7.DF.65 | Elyite | Pb4Cu(SO4)O2(OH)4 · H2O |
| 7.DF.70 | Lautenthalite | PbCu4(SO4)2(OH)6 · 3H2O |
| 7.DF.70 | Yecoraite | Fe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O |
| 7.DF.75 | Riomarinaite | Bi(SO4)(OH) · H2O |
| 7.DF.80 | Dukeite | Bi3+24Cr6+8O57(OH)6 · 3H2O |
Other Information
Notes:
Dissolved by HCl with release of chlorine. Turns brown and then black with dilute HNO3. Not attacked by cold acetic acid.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Despujolsite
mindat.org URL:
https://www.mindat.org/min-1269.html
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References for Despujolsite
Reference List:
Gaudefroy, Christophe, Granger, Marie-Magdeleine, Permingeat, François, Protas, Jean (1968) La despujolsite, une nouvelle espèce minérale. Bulletin de Minéralogie, 91 (1) 43-50 doi:10.3406/bulmi.1968.6185
Localities for Despujolsite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia | |
| Vera Munro-Smith (2006) |
Bolivia | |
| Econ Geol (1997) +1 other reference |
Bulgaria | |
| Onac et al. (2011) | |
Canada | |
| Shang (2000) |
| Greengrass et al. (1999) | |
Japan | |
| Brandon et al. (2009) |
Morocco (TL) | |
| Bull.Soc.fr.Min.Crist. (1968) |
Nicaragua | |
| Hynek et al. (2013, March) +1 other reference |
South Africa | |
| Cairncross photo ID 729306 |
| Barkley et al. (2011) +1 other reference | |
USA | |
| NMBGMR Open-file Report - 535 |
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N'Chwaning III Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa